Husband-and-wife team Mick Manning and Brita Granstrom suggest numerous activities for dinosaur-lovers, such as making a ""Pterosaur Mobile,"" Triceratops mask and a dinosaur video in Dinomania: Things to Do with Dinosaurs. Informative ""fact bites"" appear throughout; an index with pronunciation guide closes the volume; endpapers double as dinosaur stencils. (Mar.)